Portable line tester or similar article



FIG. 1 is a bottom, front, and right side perspective view of a portable line tester or similar article showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a bottom plan view;

FIG. 4 is a front elevational view;

FIG. 5 is a right side elevational view; and

FIG. 6 is a top plan view thereof. 

The ornamental design for a portable line tester or similar article, as shown. 